1. Boot your system with the Windows XP/2000 Install CD, let the system start the Setup. Once in the Setup, choose to run the Recovery Console.
First, we will recover the System Hive.
Now type the following commands pressing Enter after each line.
md tmp
copy C:\windows\system32\config\system C:\windows\tmp\system.bak
delete C:\windows\system32\config\system
copy C:\windows\repair\system C:\windows\system32\config\system
Try to boot the system, if it doesn't start, get back into the Recovery Console and enter the following commands.
md tmp
copy C:\windows\system32\config\software C:\windows\tmp\software.bak
delete C:\windows\system32\config\software
copy C:\windows\repair\software C:\windows\system32\config\software
Try to boot the system.